Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1476
PUT
Landstar System
LSTR
$6.8B
| $5.96M | ﹤0.01% |
30,900
+27,800
| +897% | +$5.28M |
|
1477
PUT
New Fortress Energy
NFE
$101M
| $5.96M | ﹤0.01% |
194,700
+190,200
| +4,227% | +$6.25M |
|
1478
PUT
InMode
INMD
$872M
| $5.95M | ﹤0.01% |
275,500
+94,700
| +52% | +$2.12M |
|
1479
PUT
Corteva
CTVA
$59.7B
| $5.95M | ﹤0.01% |
103,200
-61,700
| -37% | -$3.19M |
|
1480
CALL
Hims & Hers Health
HIMS
$6.5B
| $5.95M | ﹤0.01% |
384,500
+358,500
| +1,379% | +$4.04M |
|
1481
CALL
Teradyne
TER
$54.8B
| $5.95M | ﹤0.01% |
52,700
+10,100
| +24% | +$1.05M |
|
1482
PUT
Marriott Vacations Worldwide
VAC
$3.24B
| $5.95M | ﹤0.01% |
55,200
+8,200
| +17% | +$740K |
|
1483
CALL
Scotiabank
BNS
$106B
| $5.93M | ﹤0.01% |
114,500
+56,500
| +97% | +$2.71M |
|
1484
CALL
Darling Ingredients
DAR
$9.93B
| $5.92M | ﹤0.01% |
127,400
-24,100
| -16% | -$1.06M |
|
1485
CALL
Sun Life Financial
SLF
$45.6B
| $5.91M | ﹤0.01% |
108,300
+80,400
| +288% | +$4.25M |
|
1486
CALL
Galicia Financial Group
GGAL
$7.92B
| $5.91M | ﹤0.01% |
232,500
-65,600
| -22% | -$1.36M |
|
1487
CALL
Gold Fields
GFI
$29.2B
| $5.9M | ﹤0.01% |
371,500
-284,700
| -43% | -$3.96M |
|
1488
PUT
VeriSign
VRSN
$25.3B
| $5.89M | ﹤0.01% |
31,100
+11,700
| +60% | +$2.3M |
|
1489
CALL
Lamb Weston
LW
$6.82B
| $5.89M | ﹤0.01% |
55,300
-70,300
| -56% | -$7.32M |
|
1490
CALL
Lincoln National
LNC
$7.91B
| $5.89M | ﹤0.01% |
184,400
-3,500
| -2% | -$96.7K |
|
1491
Elbit Systems
ESLT
$38.4B
| $5.88M | ﹤0.01% |
27,960
+4,316
| +18% | +$898K |
|
1492
PUT
PACCAR
PCAR
$69.6B
| $5.86M | ﹤0.01% |
47,300
+10,200
| +27% | +$1.1M |
|
|
EMBJ
1493
PUT
Embraer S.A. ADS
EMBJ
$11.6B
| $5.85M | ﹤0.01% |
219,500
+74,300
| +51% | +$1.47M |
|
1494
CALL
Boston Properties
BXP
$11B
| $5.83M | ﹤0.01% |
89,200
+16,300
| +22% | +$1.08M |
|
1495
PUT
Sprouts Farmers Market
SFM
$7.04B
| $5.82M | ﹤0.01% |
90,300
+40,000
| +80% | +$2.23M |
|
1496
CALL
Axcelis
ACLS
$4.12B
| $5.81M | ﹤0.01% |
52,100
+7,700
| +17% | +$918K |
|
1497
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$105M
| $5.81M | ﹤0.01% |
241,300
+149,200
| +162% | +$3.44M |
|
|
ARR
1498
PUT
Armour Residential REIT
ARR
$2.02B
| $5.8M | ﹤0.01% |
293,200
-5,900
| -2% | -$113K |
|
1499
Fluor
FLR
$7.29B
| $5.79M | ﹤0.01% |
+137,060
| New | +$5.26M |
|
1500
CALL
Saia
SAIA
$11.3B
| $5.79M | ﹤0.01% |
9,900
+5,600
| +130% | +$2.93M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.